Well, it depends what you want to do, Dans. You'd be quite surprised to see the range available, from various manufacturers such as big names such as Revell, Academy (to name but a few) and 'garage' companies such as Aeroclub for instance. You can even find white metal seats and other bits to maske them more 'realistic'.
They are also cheap and a good way to get started in conversion jobs. You mess it up, well you are only short of a few dollars. Try conversion with Tamiya models..!
True enough decvals are not very easy to find, but there are some available, and many 1/144 kits have been 'declined' Hasegawa- or Fujimi-like with various boxes with different schemes.
For larger models such as Tu-22, B-1b, B-2, B-36 and the like it's the only 'manageable' scale (I do not have that much room). For airliners, it's the best scale in terms of choice and aftermarket bits (conversion items, decals, PE sets,..) and many of those can be turned into military types anyway (VC-10, DC-3, Tristar, ..).
So my advice is go for it!